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Ask QuestionPosted by Rishvanth Rajaa 6 years, 4 months ago
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Shriman Akash 6 years, 4 months ago
Posted by Vaishnavi Singh 6 years, 4 months ago
- 6 answers
Gaurav Seth 6 years, 4 months ago
SI unit of solid angle:
A steradian is the SI unit of solid angle.It can be defined as the solid angle substended at a center of an unit,sphere by a unit area on its surface.For a general sphere of radius r, any portion on its surface with area A= r2
Posted by Rohit Sahu 6 years, 4 months ago
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Posted by Arjun Rajput 6 years, 4 months ago
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Posted by Gurwinder Singh 6 years, 4 months ago
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Robinpreet Kaur 5 years, 8 months ago
Jassi Midha 6 years, 4 months ago
Posted by #Aditi~ Angel???? 6 years, 4 months ago
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Sia ? 6 years, 4 months ago
- Let us first consider the vertical upward motion of ball upto highest point, we have
u = 20 m/s, v = 0
a = -10 m/s2, t = t1,
x = ?
Using the relation, v2 = u2 + 2ax, we have
{tex}x = \frac { v ^ { 2 } - u ^ { 2 } } { 2 a } = \frac { 0 - ( 20 ) ^ { 2 } } { 2 \times ( - 10 ) }{/tex}= 20 m.
Hence, the ball will rise upto 20m and height from the ground = 20 + 25 = 45 m. -
From the given figure, we have upward motion A to B in time(t1) and downward motion(B to C) in time(t2)
Also Velocity at B is zero.
v = u - gt
From the top, the ball falls freely under acceleration due to gravity
{tex}\therefore \quad x = x _ { 0 } + u t + \frac { 1 } { 2 } g t _ { 2 } ^ { 2 }{/tex}
Since x = 0, x0 = 25 m, u = 0 and g = 10 m/s2
Therefore, 25 + 20 {tex}\times t- \frac12 \times10 \times t^2=0{/tex}
{tex}\Rightarrow t^2-4t-5=0{/tex}
on solving, we get t = 5 and t = -1
Time taken by the ball to hit the ground = 5 s (reject t = -1 )
Robinpreet Kaur 6 years, 4 months ago
Posted by A A 6 years, 4 months ago
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Posted by Nnnn Tttt 6 years, 4 months ago
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Posted by Subhalaxmi Sandha 6 years, 4 months ago
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Harender Singh 6 years, 4 months ago
Posted by Vishal Tiwari 6 years, 4 months ago
- 1 answers
Yogita Ingle 6 years, 4 months ago
Unification: It is the act of unifying the different laws valid for different phenomena in to a single theory that explains all the different phenomena.
Eg. Electricity, magnetism and light are different phenomena and have different laws of physics for each of them. These are unified under theory of electromagnetism;
Reduction: It is the effort to solve a complex problem by breaking it into simpler parts.
Eg. Temperature of a system is reduced to average kinetic.
Posted by Saumya Gupta 6 years, 4 months ago
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Sia ? 6 years, 4 months ago
Force is considered a vector quantity because force always has a magnitude and direction.
Posted by Aamy Styles 6 years, 4 months ago
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Gaurav Seth 6 years, 4 months ago
- Elastic Collision: In the elastic collision total momentum, the total energy and the total kinetic energy are conserved. However, the total mechanical energy is not converted into any other energy form as the forces involved in the short interaction are conserved in nature. Consider from the above graph two masses, m1 and m2 moving with speed u1 and u2. The speed after the collision of these masses is v1 and v2 . The law of conservation of momentum will give:
m1u1 + m2u2 = m1v1 + m2v2
The conservation of Kinetic Energy says:
1/2 m1u21 + 1/2 m2u22 = 1/2 m1v21 +1/2 m2v22
Posted by Purvi Patel 6 years, 4 months ago
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Posted by Purvi Patel 6 years, 4 months ago
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Adarsh Kesharwani 6 years, 4 months ago
Adarsh Kesharwani 6 years, 4 months ago
Purvi Patel 6 years, 4 months ago
Posted by Siddharth Gaurav 6 years, 4 months ago
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Sia ? 6 years, 4 months ago
A black body is an idealized physical body that absorbs all incident electromagnetic radiation, regardless of frequency or angle of incidence.
Anup Singh Baghel 6 years, 4 months ago
Robinpreet Kaur 6 years, 4 months ago
Posted by Prangshuman Kalpajit 6 years, 4 months ago
- 3 answers
Gaurav Seth 6 years, 4 months ago
Velocity of jet w.r.t. ground Vjg= 450 km/h …...(Upward)
Velocity of products relative to jet VPJ = 1200 km/h …(downward)
Hence, velocity of products relative to ground = -1200+450
= -750 km/h
Here – ve sing means downward .
Posted by Shivam Tiwari 6 years, 4 months ago
- 3 answers
Robinpreet Kaur 6 years, 4 months ago
Ayush Vishwakarma?? 6 years, 4 months ago
Posted by Ayush Vishwakarma?? 6 years, 4 months ago
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Gautam Prajapati 6 years, 4 months ago
Gautam Prajapati 6 years, 4 months ago
Posted by Mersal Bharathan 6 years, 4 months ago
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Ranjeet Kumar 6 years, 4 months ago
Posted by Ankit Tiwari 6 years, 4 months ago
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Sia ? 6 years, 4 months ago
Static friction is the force of friction which comes into play between the surfaces of contact of two bodies when there is no relative motion between the bodies inspite of applying an external force on them. Force of static friction is self-adjusting. Its value may vary from zero to limiting friction depending on the value of applied force.
Posted by A A 6 years, 4 months ago
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